“These days are too hot. Vegetables in the shed must also be protected from 'heat stroke', otherwise it will affect the yield.†At the vegetable production base of the agricultural production and marketing professional cooperatives in the Beicai Garden, Kangzhuang Town, Yanqing County, Beijing, the vegetable grower Zhang Li is busy giving tomatoes. The greenhouse is shaded on the net. He said that for vegetable greenhouses, one of the most important management factors is temperature and humidity control. In the past, the hygrometer was suspended in a greenhouse, and the temperature and humidity inside the greenhouse were adjusted based on the read values. In this way, people are particularly diligent. They must be in the shed all day long and they are prone to errors. Now the greenhouse is equipped with an automatic temperature and humidity monitoring system. The temperature of the greenhouse is high and low. The system will automatically send SMS notifications.
In addition to relying on high-tech smart devices to help reduce greenhouse vegetable greenhouses, the town of Shunde District, Lin Town, Green Farming fruit and vegetable production and marketing professional cooperatives used a greenhouse spray cooling coating method, also played a good cooling effect, the temperature within the greenhouse compared to before spraying treatment Reduced by 3 °C to 5 °C. According to Nie Haisheng, the person in charge of the cooperative, this year, the technical personnel of the Beijing Agricultural Technology Promotion Station recommended the method of cooling the paint by special cooling paints such as “Ariso†and “Li Liangâ€, and sprayed the new shade cooling paint directly on the film. On the outer surface, a white coating is formed. While reducing the transmittance of light, direct light passes through and becomes scattered light, which can significantly reduce the light intensity and temperature in the shed.
Experts remind that at the moment of a critical period of increasing vegetable production, continuous high-temperature weather is very unfavorable to the production of vegetable facilities.
It is recommended to increase ventilation and reduce the temperature and humidity in the shed. During sunny days, the greenhouse, greenhouse roof, and waist opening should all be opened. At the same time, we must also pay attention to strengthening the adjustment of plants, timely removal of lateral branches, old leaves and diseased leaves, increase ventilation and light transmission. By strengthening water and fertilizer management, to meet the fruit growth needs. In addition, the high temperature season should not only strengthen the prevention and control of pests and diseases, but also rational use of drugs to ensure food safety.
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